乌梢蛇的性状特征有
A．圆盘状
B．表面黑褐色，密被菱形鳞片
C．背鳞行数成单
D．尾下鳞单行
E．背中央2～4行鳞片强烈起棱
参考答案：A,B,D
Tom likes TV and __ basketball. [ ]
A. watch, play
B. to watch; playing
C. watching; playing
D. watching; to play
小规模纳税人可以自己开增值税普票和专票吗？
